M. Linehan developed "dialectical behavioral therapy" specifically to treat chronically suicidal borderline patients. It rests on a biosocial model that assumes a disorder in the regulation of emotions and in tolerance of stress. The numerous dysfunctional patterns of behavior such as self-destructive behavior, inability to govern impulses or severe dissociative phenomena are regarded as attempts at problem-solving. This concept of therapy focuses on the continuing balance between the necessity of accepting maladaptive behavior patterns in both an intrapsychic and an interactional context while still working to change them. A comprehensive manual outlines the clearly structured therapy and integrates a wide choice of therapeutic strategies. Parallel to development of the therapy itself, a method also was developed for testing therapist adherence to the manual's guidelines, thus providing a basis for empirical evaluation. An initial controlled, randomized study demonstrated the significant superiority of this method to methods of unspecific psychotherapy at various levels. In the current endeavor to develop disorder-specific approaches to the treatment of personality disorders, "dialectical behavioral therapy" is a noteworthy model.